class_docstr: Example of integrating with Tkinter.
code: def run(self):
      self._onTimeout()
      self.loop.run_forever()
  
file_path: ib_insync/examples/tk.py
imports: import asyncio
  import tkinter
  from ib_insync import IB, util
  from ib_insync.contract import *
label_desc: Use image node_id 3 for calling the TkApp obj's underlying member method code with example usage: obj.run() without return types